Expanding brake.



E. P. KELLEY.

EXPANDING BRAKE.

APPLICATION FILED JUNE 2o, 1910.

W/msssfs:

@NEED STATES Parenti" @or" rion'-f-f EDWARD F. KELLEY, or BRIDGEPORT, coNNEc'rrotir, AssIeNon 'ro THE noYAnEoUrr- 'MENT COMPANY, or BR1DeEronT,'coNNECTIcUT, A coRPoRArroN oF coNNEcTrcor.

'EXPANDING BRAKE.

To alt'fwhom it may concern:

Be it known that I, EDWARD F. KELLEY, a. citizen of the United States, residing at Bridgeport, county of' Fairfield, Sta-te 'of Connecticut, have invented an Improvement in Vllxpanding Brakes, of which. the tollowj ing is a specification..

This invention has'for its obgect to provide an internal expanding brake adapted for general use upon machinery andyeliieles and especially' adapted' for use upon mot-or cars in whichfthebraking eifect shall be relatively gre'atjn comparison with the operating force and Willl be equally eflicient 1n either direction of rotation of the drum. With'this and other objects in vieiv I have devised the novel expanding brake which 4.[ will 'now describe, referring tortheaccompanying drawing forming a part of thls specification and usingr reference characters l to indica-'te the Iseveral parts.

' Figure 1 is an elevationof my novel brake in its normal or inoperative position,.the

- v'drinn being Ain section on'the line 1--1 in 25 Fig. 2, looking in the direction. of the arrows; Fig. '2 a section on the line 2-2 in Fig;v 1, looking in the direct-ion of the arrows; and Fig. 3 'is a view corresponding with Fig. 1, showing the brake in its operative or holding position.

.10 denotes the drum` which is rot-ary, 11 an axle whiehis non-rotary, 12 the brake band and 13 the, brake facing or pad. The

brake pad lies in proximity to the innerA periphery of the drum and is secured to and retained in place by'the brake`band. The brake and the operating mechanism -t-herefor are 'supported by means of an anchor. plate 14; which is rigidlysecured to the axle. 15 denotes a stay 'piece which is rigidly secured to the brake band on its inner periphery on the upper side. This stay piece is provided with an elongated opening 16 which is engaged by a stud 17 Whichextends from the anchor plate.

18 denotes ears rigidly secured to one end of the brake band, the left end as seen in'- Figs. 1 and 3, to which a lever 19 is pivoted.

20 denotes ears rigidly secured to the opposite endI of the brake band, the right endosshown in' F igs. 1 and 3, -21 e. rock shaft .mounted to oscillate in the anchor plate- Which is made relatively heavy and is suit.-

' ably shaped to meet the requirements of use,

22 an operating arm' which extends from the Specification of Letters Patent.

Application led June 20, 1910. Serial No. 567,773.

PatentedA JuneV rock shaft and'i23 an operating rodi-'pivoted lto the operating arm. 24 denotesanfaril extending from the opposite'end of "thejrock shaft,- 25 an operating lluk pivoted to'srid armand .to the treeend of lever 119, '2("La-h-i'1h 50 which is mounted in ears 20,' and'lZTf-la threaded adjusting rod which passes #freely through a transverse hole in said huband is provided at its oppositeend 'with" afyoke :'28 which is pivoted to lever 19 at approxi-65 mately its mid length. The adj ustinentof the brake is effected by means ot` nuts 29and30 which engage the adjustingr rod onf opposite sides ot' the hub. 31 is a set nutfoii said-rodrl by which the parts' are locked finposition: 70

aiter adjustment. Should the brakef-pad become u'orn'in use, the wear is'takcn. up by means of the nuts on the adjustingiodf so Aas to give the pad effective contact. with the, inner periphery of the drum.` "if The operation is as follows: Apulliupon the operating rod oscillates `the-'rock shaft and by means of thelink swings lever-"15) from .the inoperativeposition,- as inrF-ig; 1,

to the operative position, as in Figq'. .'Theiso effect of this movement is by meansof ears 15 to crowd the left end of the 'brake-band, 'as seen in Figs. 1 and 3, outward, that :isto- Ward'the'l'eft. Simultaneously, byi'meansfot.` the adjusting bolt, hub 26- ad-ea1sf20,f"the right end of the brake band isvalso.A crowded outward, that is toward the right,` as shown .in Figs. 1 and 3. The eii'ect of this Inovement upon the brake band as a. Whole is to expand the entire band and canse the entire brake pad to bear forcibly upon the linner periphery of the drum, stay piece 15 rising away from stud 17, as-clearly shown in Fig. 3. As soon as the -pull upon the operating rod is relieved, the brake band, carrying the pad with it, contracts to its normal position, as. il ig. 1, stay piece 15 resting upon the 'stud which supports the band and the pad. It will b e obvious that it is Wholly immaterial in which direction the drum is rotating, as the operation ofthe brake is wholly independent of the direction of rotation of thev drum.

Having thus described -my invention I claim:

1.- A brake of the character described coinprising s band adapted to engage the inner periphery o f a drum, and provided with a stay piece by which it is retained in place, a

vlever having one end pivotally connected 11,9

with one 'end of said band, an operating link pivoted to the other end of said lever, a hub connected with the other end, of said band,"

a rod pivoted lat one end to said lever, the

.other end extending transverselyjthrough said hub, means for adjustably connecting 'said rod and 'said hub, and means for actuating said link. n

2. A brake of the 'character describedwzomf vprising a band adapted to engagethe inner periphery of a drum, and provided with a stay piece by which it is retained in place, a

' plate, a4 band adapted to engage a drum and provided with a stay piece connected to said anchor plate, a `ever having one end pivotally connected with one end of the band,

an operating link pivoted tothe other end of said lever, means carried by said anchor plate for actuating said link, a hub carried by the other end of said band, a rod pivoted at one yend to said lever the other en d being extended transversely through said hub, andmeans for adjustably coi'inecting said rod and hub.

45. A brake comprisinga stationary anchor i plate, a band adapted to engage a drum and provided with stay piece connected to said 'anchor plate, a lever pivoted to one end of the band, an operatin link pivoted to said lever, means carried y said anchor plalte for actuating said link, and a rod arranged substantially arallel with said -link and connecting sai lever with the other end of said band, and means for adjusting said rod.

5. A brake of the character described comprising a band adapted to engage the inner Y periphery of'a drum and provided with a stay piece having an elongated opening, a stationary anchor plate having a studiengaging said opening to support said band, a lever having one end pivotally connected with one end of said band, an operating link pivotedt-o the other end of said lever, a vrod pivoted to said lever at a point between the ends of the latter and connected with the other end of said band, and means for actuating said link.

6. A brake of the character described comprising a band adapted t0 engage the inner periphery-of a drum and provided with a stay piece having anelongated opening, a

stationary anchor plate having a stud en gaging said opening to support said band, a lever having one end pivotally connected with one end of said band, an operating link pivoted to the other end of said lever, a hub carried bythe other end of said band, a rod pivoted to said lever at apoint between the ends of the latter and having a threaded portion extending transversel through said hub, nuts working on the readed' portion of said rod and located oli-opposite sides of the Ihub, and means or actuating said lik.

In testimony whereof I affix my signa-ture .in presence of two witnesses.

' EDWARD F. TELLEY.

Witnesses:

A. M. Woos'rn, S. VW. A'rHERToN. 

